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Hemoglobin electrophoresis is a blood test that can detect different types of hemoglobin. The test can detect hemoglobin S, the form associated with sickle cell disease, as well as other abnormal types of hemoglobin, such as hemoglobin C. It can also be used to investigate thalassemias, which are disorders caused by defective hemoglobin production.
A schematic of hemoglobin electrophoresis, showing the banding which is typical of various types of hemoglobin. Note that sickle cell disease (SCD) gives a single, bold band whereas sickle cell trait gives two slightly fainter bands. Where SCD is suspected, a number of tests can be used.
The cause of this difference was pinpointed in 1956 and 1957, when Vernon Ingram used protein fingerprinting (a combination of electrophoresis and chromatography) to show that the key difference between normal hemoglobins and sickle cell hemoglobins was a single difference in one chain of the protein: a glutamic acid residue on the normal ...
In collaboration with Linus Pauling, Itano used electrophoresis to demonstrate the difference between normal hemoglobin and sickle cell hemoglobin; their 1949 paper "Sickle Cell Anemia, a Molecular Disease" (coauthored also with S. J. Singer and Ibert C. Wells) [2] was a landmark in both molecular medicine and protein electrophoresis, though ...
The hemoglobin structural variants can be broadly classified as follows: [19] Sickle cell disorders, which are the most prevalent form of hemoglobinopathy. Sickle hemoglobin (HbS) is prone to polymerize when deoxygenated, precipitating within the red blood cell. This damages the RBC membrane resulting in its premature destruction and consequent ...
Hemoglobin A2 may be increased in beta thalassemia or in people who are heterozygous for the beta thalassemia gene. HbA2 exists in small amounts in all adult humans (1.5–3.1% of all hemoglobin molecules) and is approximately normal in people with sickle-cell disease. [1] Its biological importance is not yet known.
Thus, it was not clear whether it was involved in sickle cell disease. Genetically, the abnormal hemoglobin was only in heterozygous condition. [22] The next year, Neel and his colleagues established that the hemoglobin is associated with sickle cell disease. [23] The hemoglobin was named hemoglobin III, [24] but hemoglobin C was eventually used.
Sickle cell-beta thalassemia is an inherited blood disorder. ... Diagnostic tests include DNA sequencing, hemoglobin electrophoresis, ...
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